1afterTransition(callback) {
2    const handler = () => {
3        callback();
4        this.$refs.carouselInner.removeEventListener('transitionend', handler);
5    };
6    this.$refs.carouselInner.addEventListener('transitionend', handler);
7},
8
9withoutTransition(fn) {
10    this.disableTransition();
11    fn();
12    this.$refs.carouselInner.offsetHeight; // Force reflow
13    setTimeout(() => this.enableTransition(), 50);
14},
15
16next() {
17    this.afterTransition(() => {
18        const maxIndex = this.originalSlides.length * 2;
19        if (this.currentSlide >= maxIndex) {
20            this.withoutTransition(() => {
21                this.currentSlide -= this.originalSlides.length;
22            });
23        }
24    });
25    this.currentSlide++;
26},
27
28prev() {
29    this.afterTransition(() => {
30        if (this.currentSlide < this.originalSlides.length) {
31            this.withoutTransition(() => {
32                this.currentSlide += this.originalSlides.length;
33            });
34        }
35    });
36    this.currentSlide--;
37},